/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffectComponent.h
Can the GameplayEffectSpec apply to the passed-in ASC? All Components of the GE must return true, or a single one can return false to prohibit the application. Note: Application and Inhibition are two separate things. If a GE can apply, we then either Add it (if it has duration/prediction) or Execute it (if it's instant).
virtual bool CanGameplayEffectApply ( const [FActiveGameplayEffectsContainer](API\Plugins\GameplayAbilities\FActiveGameplayEffectsContainer) & ActiveGEContainer, const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & GESpec ) const